$ git clone -n https://src.fedoraproject.org/rpms/opencv.git /var/lib/mock/f41-build-822716-153216/root/chroot_tmpdir/scmroot/opencv
Cloning into '/var/lib/mock/f41-build-822716-153216/root/chroot_tmpdir/scmroot/opencv'...
$ git fetch origin f24d288f01d1754b64ec1d498f639dfd7c426c9a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opencv
 * [new ref]         f24d288f01d1754b64ec1d498f639dfd7c426c9a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f24d288 Update to 4.10.0 upstream release